1. Department of Biological Sciences, Center for Human Health and the Environment, North Carolina State University, Raleigh, North Carolina, USA
2. Department of Medicine, Duke University Medical Center, Durham, North Carolina, USA
3. Department of Obstetrics and Gynecology, Division of Reproductive Sciences, Duke University Medical Center, Durham, North Carolina, USA
4. Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
5. Department of Pediatrics, Division of Gastroenterology, Hepatology, and Nutrition, Duke University Medical Center, Durham, North Carolina, USA
6. Department of Radiology, Duke University Medical Center, Durham, North Carolina, USA
7. Bioinformatics Research Center, North Carolina State University, Raleigh, North Carolina, USA